Malicious PDF — malware analysis report

Static analysis result for SHA-256 0913a2082626b3fa…

MALICIOUS

PDF

35.4 KB Created: 2021-06-23 00:46:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db8c1cbd762d0a0915045d921b04d58f SHA-1: b6353f25feb7cb4a8f155ca41e009c962a46f169 SHA-256: 0913a2082626b3fa0953f7d4003b20e45e6b6f1ff6047fa3926944d50f7f7ddf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains lures for game hacks and free items, directing users to a malicious redirector. This redirector, in turn, hosts other malicious PDFs, indicating a multi-stage lure campaign. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/free-hair-roblox-promo-codes-2021-game-hack In PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/roblox-cheat-download-no-survey_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/roblox-hack-rpg-world-autofarm-buy-egg-tp-island-2021_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/hack-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/roblox-cheat-engine-63-mac_GM431946152.pdfIn PDF document text
    • http://www.vaytechceramic.com/uploaded_files/userfiles/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3190 22388 bytes
SHA-256: c724c727ab825cd5951aa7a6976430b3cc3ea2ac056c38083e65d2a8d1b203b0
font_01_sfnt_off00006354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6354 19760 bytes
SHA-256: cfdc7dc43576f2c6fd4820d5ffbe6359f5958d3a4b371c0116d77bd1d523594f

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